“Depicting fire and other gaseous phenomena using diffusion processes” by Stam and Fiume

  • ©Jos Stam and Eugene Fiume




    Depicting fire and other gaseous phenomena using diffusion processes



    Developing a visually convincing model of fire, smoke, and other gaseous phenomenas among the most difficult and attractive problems in computer graphics. We have created new methods of animating a wide range of gaseous phenomena, including the particularly subtle problem of modelling “wispy” smoke and steam, using far fewer primitives than before. One significant innovation is the reformulation and solution of the advection-diffusion equation for densities composed of “warped blobs”. These blobs more accurately model the distortions that gases undergo when advected by wind fields. We also introduce a simple model for the flame of a fire and its spread. Lastly, we present an efficient formulation and implementation of global illumination in the presence of gases and fire. Our models are specifically designed to permit a significant degree of user control over the evolution of gaseous phenomena.


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